Carbureter.



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FRANK H. HEITGER, 0F INDIANAPOLIS, INDIANA, ASSIGNOB- '10 HEITGERCARBUR-ETOR COMPANY, OF INDIANAPOLIS, INDIAYA. A CORPORATION OFINDIANA.

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Specification of Letters Patent.

Patented Mar. 23, 1915.

Application filed June 8, 1912. ScrialNo. 762.615.

T 'all 2071 am it may concern Be it known that I. FRANK.H. Hnircnn, acitizen of the United States,residing at Indianapolis. Marion county.and State of Indiana. have invented and discovered certain new anduseful Improvements in Carbureters, of. \VlllCll the followlng s a spoonfor controlling the feed of the gasolene. or

other hydro-carbon fuel, whereby the supply may be automaticallyregulated to suit the requirements of the speed of the engine andconditions under which it is operating. all as will be hereinafter morefully. described and claimed.

Referring to the accompanying drawings, which are made a part hereof andon which similar reference characters indicate similar parts; Figure 1is a side elevation of a carburetor embodying my said invention: Fig. 2,a central vertical section through the same; Fig. 3 a detail showingportions of Fig. '2 on an enlarged scale; Fig. -l a cross section on thedotted line 4.4; Fig. 5 a

cross section on the dotted line 5+5, and

6 a cross section on the dotted line represent the mixing chamber, B thegasolene reservoir or float chamber, C an annular casing member or topinterposed between said float chamber and said mixing chamher, and D themain air supply to the spraynozzle. These several parts are or maybe ofany common or approved construction. that shown being the well-knownHeitger carburetor, and thcrefore require no special description, exceptin so far as they relate to the particularfeatures constituting mypresent invention.

The general structure and arrangementoi the parts as well as the novellures involved therein. are more pal-tn scribed in my companion app. n]no. 702,6l6.' The valve ll) for controlling the auxiliary air inlet isu'iountcd on a spring -11 as shown and described in my companionapplication No. 702,612.

. The mixing chamber has a suction tube the upper end of said 1::

threaded connection a casting 11 which embodies the connection with theair and gasolcne supply, and, the spray nozzle 12 is mounted therein.Said spray nozzle has a conical seat for the needle valve 13 and saidneedle valve is formed with longitudinal grooves in its sides throughwhich the gasolcnc is sprayed into the carburcting cham her. as isusual. Said needle valve 13 comprises a stem ha ing a head 14 which ismounted in a vertical chamber in a cylinder 16 which is formed with ascrew-threaded shank 17 that screws through the aperture in casing A.Theperiphery of said cylinder 16 is formed with a ribbed surface withwhich a spring detcnt 15 engages to prevent accidental turning. A screwcap 18 is mounted in the upper end of cylinder 16 adapted to limit themovement of head or pistonl l and said screw cap is also formed, with a.periphery having notches or ribs. with which another spring detent 19engages. to prevent accidental turning. The upper end of too stem oftheneedle' valve 13 is formed with a longitudinal bore ex- 80 tending toa point within the mixing cham- 1 her and transverse openings 20 leadradially therefrom into said mixing chamber.

in operation the needle \alve is adiusted through the medium of thecylindrical head '16 to regulate the amount of gasolene that may benormally drawn through the grooves in the periphery of the stem throughthe spray nozzle. Upon the speed of the engine increasing to a pointwherejhe suction will be sullicient. the air pressure upon pistr-n llthrough air vents will operate to elevate. said stem and needle valve 13to thedimit ot' the movement allowed by the :ul iustua-nt oi screw cap18. so that a greater ouant lv oi" so'lcne will be allowed to passiln-unogh said spray nozzle. As the speed (it the engine dec eases. theweight of the slum will (mis e stem to tall and the v ope-nil ly cl redand the sup- 5am matically rcgw v needed for the speed lug a casing withiuunbcrs. a spray *ontrolliug the liil l. a piston on d e alve. :rchamher for said piston moboted to be vertically no means foradjustingsaid needle valve to secure a normal opening of fixed area,means "for securing 'the part as adjusted, additional means for liftingsaid, needle valve oymrated by the suction of the engine, means forlimiting said lifting movement, and means for fixing the adjustment ofsaid limiting means, substantially as set forth.

3. A c'arbureter comprising a casing having cal-bursting and mixingchambers, means for regulating the feed of gasolene consisting of aspray nozzle, a needle valve for regulating the openings through. said;

spray nozzle, a piston'chamber adjustably secured 1n the casing,. apiston connected' with the stem of said needle alve and mounted in saidpiston chamber, the stemof said needle valve being formed Withaperforation to establish communication from the mixing chamber to thepiston chamber on one side of the piston and a vent being formed fromsaid opposite side of said piston,

piston chamber on the whereby the feed of gasolene may be regulatedautogine, substantially as set forth.

In Witness whereof, I have hereunto set In hand and seal at Indiana olisIndiana this twenty-first day of May, A. D. nine-- teenhundredand'twelve.

FRANK H. HEITGER. [L.- 8.] lVitnesses: 5

E. W. BRADFORD,

' A. C. RICE.

matically to conform to the speed of the en-

